The 151-11 from Weinschel by Spectrum Control is a RF Variable Attenuator with Frequency 0 to 4000 MHz, Attenuation Range 0 to 70 dB, Power 100 W, Insertion Loss 0.9 to 2.98 dB. Tags: Benchtop, Programmable, Digital, Computer Controlled. More details for 151-11 can be seen below.